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发明人马晓峰,孙丽萍,林芳. "A Process for Preparing High-Purity tert-Butyl 5-azaspiro[2.5]octane-5-carboxylate" [P]. 中国发明专利, 专利号 CN 110728338 A, 授权公告日 2016-09-09.
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